/*=========================================================================

Program:   Medical Imaging & Interaction Toolkit
Language:  C++
Date:      $Date: 2010-04-06 19:06:38 +0800 (周二, 06 四月 2010) $
Version:   $Revision: 22028 $

Copyright (c) German Cancer Research Center, Division of Medical and
Biological Informatics. All rights reserved.
See MITKCopyright.txt or http://www.mitk.org/copyright.html for details.

This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.  See the above copyright notices for more information.

=========================================================================*/

#ifndef __itkMITKScalarImageToHistogramGenerator_h
#define __itkMITKScalarImageToHistogramGenerator_h


#include "itkScalarImageToListAdaptor.h"
#include "itkListSampleToHistogramGenerator.h"
#include "itkObject.h"


namespace itk {
namespace Statistics {

template< class TImageType, class TMeasurementType = 
           ITK_TYPENAME TImageType::PixelType>
class MITKScalarImageToHistogramGenerator : public Object
{
public:
  /** Standard typedefs */
  typedef MITKScalarImageToHistogramGenerator  Self;
  typedef Object                               Superclass;
  typedef SmartPointer<Self>                   Pointer;
  typedef SmartPointer<const Self>             ConstPointer;

  /** Run-time type information (and related methods). */
  itkTypeMacro(MITKScalarImageToHistogramGenerator, Object);

  /** standard New() method support */
  itkNewMacro(Self);

  typedef TImageType                                      ImageType;
  typedef itk::Statistics::ScalarImageToListAdaptor< 
                                              ImageType 
                                                      >   AdaptorType;
  typedef typename AdaptorType::Pointer                   AdaptorPointer;
  typedef typename ImageType::PixelType                   PixelType;

  typedef itk::Statistics::ListSampleToHistogramGenerator< 
                                                AdaptorType, 
                                                TMeasurementType
                                                          > GeneratorType;

  typedef typename GeneratorType::Pointer                   GeneratorPointer;

  typedef typename GeneratorType::HistogramType             HistogramType;
  typedef typename HistogramType::Pointer                   HistogramPointer;
  typedef typename HistogramType::ConstPointer              HistogramConstPointer;

public:

  /** Triggers the Computation of the histogram */
  void Compute( void );

  /** Connects the input image for which the histogram is going to be computed */
  void SetInput( const ImageType * );
  
  /** Return the histogram. o
   \warning This output is only valid after the Compute() method has been invoked 
   \sa Compute */
  const HistogramType * GetOutput() const;
  
  /** Set number of histogram bins */
  void SetNumberOfBins( unsigned int numberOfBins );
 
  /** Set marginal scale value to be passed to the histogram generator */
  void SetMarginalScale( double marginalScale );


protected:
  MITKScalarImageToHistogramGenerator();
  virtual ~MITKScalarImageToHistogramGenerator() {};
  void PrintSelf(std::ostream& os, Indent indent) const;


private:

  AdaptorPointer      m_ImageToListAdaptor;

  GeneratorPointer    m_HistogramGenerator;

};


} // end of namespace Statistics 
} // end of namespace itk 

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkMITKScalarImageToHistogramGenerator.txx"
#endif

#endif
